1. Is my concept right? Does using a csv/txt file format save me memory usage, or will it use more due to the overhead due to the file format? I cannot find such information on the web (probably 'overhead' is not the right term).
2. I believe I need some sort of file system to manage the saving and loading of files, are there library for such purpose? And again, will it use up a lot of the EEPROM memory just to implement such file system?
3.If such solution already exist for the internal EEPROM, will it be a lot harder to implement for an external EEPROM?